What is this noise?

[Andrew Bluemel]

Hi,
I realize it is hard to figure out a problem from a video but I would like some input if possible. Here's the story: so I drove my cruiser home from Costco a ways away while it is 90 degrees out. Driving home with the AC off cruising at 75 having no issues and the oh so accurate temp gauge right in the middle. Pull into the driveway and hear this noise:

As soon as I heard it I first checked the gauge again then got out my obd2 scanner and it read 202 degrees. So it's a little warm but that's not over heating is it? The radiator in it is now 10k old. Any ideas? Never had this problem in this warm weather or going over the Colorado Passes.

Thanks!

 

[zapatius]

Sounds like it's boiling? Have you checked the boiling point of your coolant? It also sounds like the radiator in my old Nissan when it had a hole I couldn't find.

 

[richardlillard1]

For one thing, as soon as you turn the engine off, it heat soaks making the coolant temp rise.

I heard some scuffing feet in the video, so check that you're not dragging your feet across the ground when you move about.

Also, look at the overflow from the rad?

EDIT:

 

[Andrew Bluemel]

Sounds like it's boiling? Have you checked the boiling point of your coolant? It also sounds like the radiator in my old Nissan when it had a hole I couldn't find.

I have not checked the boiling point. The previous owner installed the new radiator and coolant. I would be surprised if it had a hole as it is practically new.

 

[Andrew Bluemel]

For one thing, as soon as you turn the engine off, it heat soaks making the coolant temp rise.

I heard some scuffing feet in the video, so check that you're not dragging your feet across the ground when you move about.

Also, look at the overflow from the rad?

EDIT:
View attachment 1288557

So for the overflow bottle tell me if this makes sense. I should have videoed this but I did not notice till after. Last night the overflow bottle was above the full mark. Now today it is in the middle between low and full. What does that mean?

 

[Dragos80]

Just make sure there is some coolant in the system not just 100% water as some people run on their cars.

 

[Dragos80]

What does that mean?

HG job.

 

[Andrew Bluemel]

HG job.

Head gasket was just replaced 20k ago...

 

[Andrew Bluemel]

Just make sure there is some coolant in the system not just 100% water as some people run on their cars.

I can see a green color looking down the radiator

 

[Dragos80]

My next thought would be the water pump.

 

[Andrew Bluemel]

My next thought would be the water pump.

I'm sorry for my lack of knowledge on this but after doing a quick search here i don't understand why would it be the water pump?

 

[richardlillard1]

So for the overflow bottle tell me if this makes sense. I should have videoed this but I did not notice till after. Last night the overflow bottle was above the full mark. Now today it is in the middle between low and full. What does that mean?

s*** got hot, yo.

As the pressure in the system builds, the fluid needs to go somewhere, that's what the overflow tank is for and why it has a little hose out the top. When it gets too full, it shoots out the little hose. In your case, it didn't overflow enough to do that, but did use the overflow for its intended use.

Heat expands things, so as it cools and things return to normal, it sucks it back out of the overflow tank and into coolant system again. This also works when you bleed the coolant system; as air is pushed out of the system, it drinks water out of the overflow. This is why I always put a bit more in the overflow tank when I flush or drain/refill the coolant system. It's also why there should always be fluid in there, to the full line. If the truck needs a drink, the sippy cup better have some or you'll have a bad time.

If you've got green s*** on your radiator (assuming you're running green antifreeze), then it's time you replace the rad as it likely has a leak. Check for a source from the green s*** and make sure it didn't just shoot all over the place when it was hot--based on the color of your plastic top tank, it's time.

You could spend hundreds of dollars on one, but myself and about five other rigs here in AZ are running the cheap $114 RockAuto TYC brand with great results. It has nice big cores and cools the trucks exceptionally well and at that price, practically disposable.

Just make sure you adjust the angled transmission line coming out of the bottom of the line will rub on the fan shroud and tear open, pissing tranny fluid all over the ground while you're out wheeling and you'll have to repair it right next to a bush with a five foot rattle snake next to you. Then one buddy has to watch the snake while you and your other buddies crawl under the truck and start swearing at everything. Then you owe your buddies dinner because they risked life and limb to get your tranny working again.

Ha! I said tranny!

Pic related; danger noodle.

EDIT: That's a new rad?! The plastic looks brownish! Must be lighting or something. Either way, check for leaks, find the source of green s***.

 

[richardlillard1]

HG job.

Gee Ward, don't you think you're being a bit hard on the beaver?

 

[Dragos80]

I'm sorry for my lack of knowledge on this but after doing a quick search here i don't understand why would it be the water pump?

If the water pump is faulty, it does not "pump" or "circulate" enough coolant through your cooling system.
When that happens, not enough heat is being exchanged in the radiator and the coolant tends to stay at a higher operating temperature than it was designed for.

If it is not the HG or the water (coolant) pump, see NLXTACY's thread on overheating. All 50 pages.